The world's scariest places

The Toul Sleng Genocide Museum in the Phnom Penh occupies the site of a former
high school, which was converted under the Khmer Rouge into the notorious
Security Prison 21. Up to 20,000 people were imprisoned, tortured and
murdered here between 1975 and 1979. The grim museum attracts hundreds of
tourists each day, and contains photographs of inmates, skulls and
instruments of torture. Click
here to find out about other prisons you can visit.